Dark matter, say physicists, is everywhere. They say this because the gravitational forces that we observe in the known Universe are greater than the mass of visible matter would lead us to believe is possible. Dark matter, scientists speculate, is the source of the missing mass; in fact, by some estimates, dark matter accounts for at least 80% of the mass in our galaxy.

So where the Hell is it?

The short answer is: we don't know, but logic dictates that we'd basically have to be swimming in anything so abundant; there are likely billions upon billions of dark matter particles passing through your body at this very second. But how many of these particles could actually affect you?